Futaba FU1K10001 First Gear for S9602 Servo Replacement  [FU1K10001]

Service first gear for the S9602

This first gear is supplied as a service part for the Futaba S9602 servo and is intended for hobby RC use. It functions as the primary gear in the servo gearbox and is fitted when the original gear shows wear, damage, or during routine gearbox maintenance.

Fitting is straightforward for those used to small servo work: open the case, note the gear stack order, swap in the new first gear, and reassemble while checking mesh and alignment. Keep the gear teeth clean and inspect nearby bearings and splines for wear before finishing reassembly to prevent premature issues.

From a setup and maintenance perspective this part restores the mechanical link between the output shaft and the remaining gear train. Replacing a worn first gear helps preserve repeatable centring and reduces backlash caused by damaged teeth, maintaining consistent servo response in scale RC models.